Kev paub me me ntawm qhov chaw nres tsheb soldering - yog vim li cas lub melting point ntawm solder paste txawv?
Hais txog lub melting point ntawm solder paste, ntau hom solder paste muaj cov ntsiab lus sib txawv. Piv txwv li, lub melting point ntawm low-temperature solder paste yog 138 degree, thaum lub melting point ntawm high-temperature solder paste yog 217 degree. Vim li cas solder pastes muaj cov ntsiab lus sib txawv? Cov nram qab no solder paste manufacturers yuav piav qhia:
Lub melting point ntawm ntshiab tin yog hais txog 230 degree. Feem ntau hais lus, lub melting point ntawm cov ntaub ntawv alloy (ib tug sib tov ntawm ob los yog ntau tshaj hlau) yog tsawg tshaj li ntawm ib tug hlau. Raws li qhov xwm thiab cov ntsiab lus ntawm cov ntaub ntawv alloy, lawv cov ntsiab lus melting kuj txawv.
Peb hais tias qhov twg muaj kev lag luam, muaj cov khoom sib txawv. solder paste, ntau yam solder pastes yuav ua nrog cov khoom sib txawv rau cov kev xav tau sib txawv, yog li lawv cov ntsiab lus melting yuav txawv. Feem ntau hais lus, lub melting point ntawm txhuas 6337 yog 183 degree, lub melting point ntawm low-temperature tin-bismuth yog 138 degree, melting point ntawm nruab nrab kub yog 172 degree, thiab melting point ntawm high kub yog 227 degree thiab 217 degree. . Kub kub solder muab tshuaj txhuam muaj zoo dua soldering zog thiab shear quab yuam tshaj qhov kub thiab txias solder paste. Tsawg kub solder paste yog nkig thiab cov pob qij txha yog nkig.
Cov no yog cov ntsiab lus melting ntawm feem ntau cov hlau lead-free solder pastes:
Lub melting point ntawm lead-free solder paste (0307) yog 227 degree,
Lub melting point ntawm lead-free solder paste (105) yog 221 degree,
Lub melting point ntawm lead-free solder paste (205) yog 219 degree,
Lub melting point ntawm lead-free solder paste (305) yog 217 degree,
Qhov nruab nrab kub tsis muaj hmoov lead-dawb solder paste yog conventionally Sn64Bi35Ag1, nrog lub melting point ntawm txog 172 degree.
Tau kawg, kuj tseem muaj qee qhov tsis muaj cov khoom siv lead-dawb solder pastes, thiab lawv cov ntsiab lus melting yuav txawv vim muaj cov khoom xyaw sib txawv. Peb yuav tsum pom qhov txawv. Piv txwv li, lub melting point ntawm low-temperature solder paste yog 138 degree, thaum lub melting point ntawm high-temperature solder paste yog 217 degree.
